Bakugou has a sister?! (Soft Bakugou AU)

Bakugou's been missing class a lot more lately. He's been showing up late, leaving early, and skipping lunch and leaving campus. He's been looking more tired and cranky. Class 1-A and Mr. Aizawa are getting curious about what's been going on. One day, Class 1-A goes on a field trip to an orphanage to learn about orpha...